Cancer-stricken Shannen Doherty shaves head

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Photos:Celebrities battle cancer

Jaime "Taboo" Gomez of the Black Eyed Peas revealed in November that he survived testicular cancer.

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Photos:Celebrities battle cancer

Actor Ben Stiller revealed in October he was diagnosed with prostate cancer in 2014. The tumor was surgically removed three months later, in September 2014, and Stiller has been cancer-free since.

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In August 2015, actress Shannen Doherty confirmed to People that she is undergoing treatment for breast cancer. She went public with the news after TMZ reported she was suing a former business manager, accusing her of letting the star's health insurance lapse. In August 2016, she said that the cancer has spread and she's had a single mastectomy.

Former Rolling Stone bass player Bill Wyman has been diagnosed with prostate cancer. An original member of the band, which formed in 1962, Wyman left the group in 1992. The 79-year-old is expected to make a full recovery.

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Hugh Jackman posted a photo to Facebook indicating he had been treated for skin cancer for at least the fourth time since 2013.

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Grateful Dead bassist Phil Lesh took to Facebook to reveal he's battling bladder cancer. In an apology to fans for canceling a pair of concerts, Lesh announced he's received treatment at the Mayo Clinic and his prognosis is good.

Def Leppard guitarist Vivian Campbell, 52, pulled out of the band's tour in June after his Hodgkin's lymphoma returned.

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Tommy Chong of Cheech & Chong, who was diagnosed with prostate cancer in 2012, told Us magazine that he is undergoing treatment for rectal cancer. As he did for the prostate cancer, he's using marijuana to take the edge off: "I'm using cannabis like crazy now, more so than ever before," he told the magazine.

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Sir John Hurt, known for performances in "Alien," "The Elephant Man" and the Harry Potter movies, told the British Press Association that he has pancreatic cancer. The disease is in its early stages, he said, and he is "more than optimistic about a satisfactory outcome, as indeed is the medical team."

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Actress Rita Wilson, who can be seen on HBO's "Girls," revealed April 14 that she is fighting breast cancer and has undergone a double mastectomy. She thanked her family, including husband Tom Hanks, and doctors for their support in a statement to People magazine.

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Fans of singer Morrissey knew the star had been ill after he canceled some U.S. tour stops in June, but it appears the performer has been battling cancer. "They have scraped cancerous tissues four times already, but whatever," Morrissey said in an interview with Spanish-language outlet El Mundo. "I am aware that in some of my recent photos I look somewhat unhealthy, but that's what illness can do. I'm not going to worry about that."

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When former "Good Morning America" host Joan Lunden learned she was facing an "aggressive" form of breast cancer, she was determined to face her health battle head on. Knowing she would need chemotherapy, Lunden decided to remove her familiar blond hair before her locks could be affected by the treatment. "You know it's going to happen one of these days and you are wondering how or when," Lunden explained to People magazine, which she posed for without her wig in September. "So I just owned it."

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Former "Dancing With the Stars" co-host Samantha Harris was diagnosed with breast cancer and underwent a double mastectomy. Harris told People magazine she detected a lump during a self-exam and then followed up with a specialist after receiving a clean mammogram.

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Actress Brittany Daniel of "Sweet Valley High" and "The Game" fought stage IV non-Hodgkin's lymphoma. Daniel recalls in an issue of People magazine that her 2011 diagnosis "happened so suddenly," but she was able to face it with the support of her family.

ABC's Amy Robach found out she had breast cancer in November 2013 after she had a mammogram done live on "Good Morning America" for cancer awareness month.

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Radio personality Robin Quivers quietly battled cancer for months, but she had happy news to share with "Howard Stern" listeners in September 2013. On the show, Quivers revealed that her doctors believe she's cancer-free after receiving treatment, including chemotherapy.

Sharon Jones held off plans to tour and release a new album with the Dap-Kings after being diagnosed with stage 1 bile duct cancer in 2013.

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Michael Douglas offered some interesting insight as to how he may have developed the throat cancer that he was diagnosed with in August 2010. Douglas later told the "Today" show that his tumor was gone.

Actress Christina Applegate had a bilateral mastectomy in 2008. Doctors had diagnosed her with cancer in her left breast and offered her the options of either radiation treatment and testing for the rest of her life or removal of both breasts.

KISS band member Peter Criss sat down with CNN's Elizabeth Cohen in 2009, a year after his battle with breast cancer. The musician said he wanted to increase awareness of the fact that men can also get the disease.

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Cynthia Nixon not only joined the cast of Showtime's "The Big C," about a woman battling the disease, and portrayed a woman with cancer in the Broadway play "Wit" -- Nixon was diagnosed with breast cancer in 2006.

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Zoraida Sambolin was diagnosed with breast cancer in April 2013, and she chose to have a double mastectomy. Sambolin said that Angelina Jolie's New York Times opinion piece about undergoing the procedure gave her courage to share her story.

"Three's Company" star Suzanne Somers spoke with CNN's Piers Morgan in 2012 about her stem cell surgery and her bout with breast cancer. She was diagnosed in 2001, which is when she began researching alternative methods to reconstructive surgery.

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Olivia Newton-John was diagnosed in 1992, and the singer has become an advocate for breast self-examination.

On Tuesday, Doherty posted images on her Instagram account. In one, she is being hugged by her mother, Rosa Doherty. In another, friend and model Anne Marie Kortright takes a photo as the actress cuts her hair.

A photo posted by ShannenDoherty (@theshando) on Jul 19, 2016 at 9:05pm PDT

Doherty had earlier instagramed a photo with the caption "Cupcake pan, chocolates and a razor.... Stay tuned. @annemkortright has got this. #cancersucks #thankgodforfriends," to tease that she would be shaving her head.

Doherty's social media followers responded with well wishes.

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"Still as beautiful as when I watched you on 90210. Keep fighting the fight. You got this girl," read one comment.